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Fiberglass Reinforced Polymer (FRP) materials equivalent to non-combustible material?

Question asked by yunlongliu on Mar 22, 2020
Latest reply on Mar 23, 2020 by milt.werner

While Fiberglass Reinforced Polymer (FRP) materials have an excellent fire resistance rating under ASTM and UL tests, it is not classified as non-combustible under ASTM E136.


NFPA 130, 101 definition of Non-combustible material:

4.7  Non-combustible Material

A material that complies with any of the following shall be considered a noncombustible material [101:].

(1)  A material that, in the form in which it is used and under the conditions anticipated, will not ignite, burn, support combustion, or release flammable vapors, when subjected to fire or heat. [101:]

(2)  A material that is reported as passing ASTM E136. [101:]

(3)  A material that is reported as complying with the pass/fail criteria of ASTM E136 when tested in accordance with the test method and procedure in ASTM E2652.  [101:]

FRP materials can meet the following minimum standards for flammability:

  • ASTM E84:  Standard Test Method for Surface Burning Characteristics of Building Materials:  Flame spread 25
  • ASTM D635:   Standard Test Method for Rate of Burning and/or Extent and Time of Burning of Plastics in a Horizontal Position:  Self-extinguish
·         UL 94 Tests for Flammability of Plastic Materials for Parts in Devices and Appliances:  V-0

Can this material be considered an equivalent to non-combustible material?